Available with Spatial Analyst license.

## Summary

Calculates a per-cell statistic from multiple rasters.

The available statistics are Majority, Maximum, Mean, Median, Minimum, Minority, Range, Standard deviation, Sum, and Variety.

## Illustration

## Usage

The order of the input rasters is irrelevant for this tool.

For statistic types Maximum, Minimum, Mean, Median, Majority, Minority and Sum, if a single raster is used as the input, the output cell values will be the same as the input cell values. For Range and STD the output cell values will all be 0, and for Variety, all 1.

See Analysis environments and Spatial Analyst for additional details on the geoprocessing environments that apply to this tool.

## Syntax

CellStatistics (in_rasters_or_constants, {statistics_type}, {ignore_nodata})

Parameter | Explanation | Data Type |

in_rasters_or_constants [in_raster_or_constant,...] | A list of input rasters for which a statistic will be calculated for each cell within the Analysis window. A number can be used as an input; however, the cell size and extent must first be set in the environment. | Raster Layer | Constant |

statistics_type (Optional) | Statistic type to be calculated. - MEAN — Calculates the mean (average) of the inputs.
- MAJORITY — Determines the majority (value that occurs most often) of the inputs.
- MAXIMUM — Determines the maximum (largest value) of the inputs.
- MEDIAN — Calculates the median of the inputs.
- MINIMUM — Determines the minimum (smallest value) of the inputs.
- MINORITY — Determines the minority (value that occurs least often) of the inputs.
- RANGE — Calculates the range (difference between largest and smallest value) of the inputs.
- STD — Calculates the standard deviation of the inputs.
- SUM — Calculates the sum (total of all values) of the inputs.
- VARIETY — Calculates the variety (number of unique values) of the inputs.
The default statistic type is Mean. | String |

ignore_nodata (Optional) | Denotes whether NoData values are ignored by the statistic calculation. - DATA — Only cells that have data values will be used in determining the statistic value.If a NoData value exists at a certain location, the NoData value will be ignored. Only cells that have data values will be used in determining the output. This is the default.
- NODATA — All input cells at each location, including those with a value of NoData, will be used in determining the statistic.
| Boolean |

### Return Value

Name | Explanation | Data Type |

out_raster |
The output raster. The value is determined by applying the specified statistic type to the input rasters. | Raster |

## Code Sample

##### CellStatistics example 1 (Python window)

This example calculates the standard deviation per cell on several input Grid rasters and outputs the result as an IMG raster.

```
import arcpy
from arcpy import env
from arcpy.sa import *
env.workspace = "C:/sapyexamples/data"
outCellStats = CellStatistics(["degs", "negs", "cost"], "STD", "DATA")
outCellStats.save("C:/sapyexamples/output/outcellstats.img")
```

##### CellStatistics example 2 (stand-alone script)

This example calculates the standard deviation per cell on several input Grid rasters and outputs the result as a Grid raster.

```
# Name: CellStatistics_Ex_02.py
# Description: Calculates a per-cell statistic from multiple rasters
# Requirements: Spatial Analyst Extension
# Import system modules
import arcpy
from arcpy import env
from arcpy.sa import *
# Set environment settings
env.workspace = "C:/sapyexamples/data"
# Set local variables
inRaster01 = "degs"
inRaster02 = "negs"
inRaster03 = "cost"
# Check out the ArcGIS Spatial Analyst extension license
arcpy.CheckOutExtension("Spatial")
# Execute CellStatistics
outCellStatistics = CellStatistics([inRaster01, inRaster02, inRaster03], "RANGE", "NODATA")
# Save the output
outCellStatistics.save("C:/sapyexamples/output/cellstats")
```

## Environments

## Licensing Information

- ArcGIS for Desktop Basic: Requires Spatial Analyst
- ArcGIS for Desktop Standard: Requires Spatial Analyst
- ArcGIS for Desktop Advanced: Requires Spatial Analyst